The link to a normal Whale sound is the same link as this chap at 52 Hertz.
I do find his path tracks interesting and they do seem to have a central point and do wonder what is of note there, food!
Supprised no DNA samples have been taken, though I suspect we can't eliminate some form of polution inducing a genetic mutation. We have humans with high-pitched voices so anything is possible.
But fair play to the chap in carrying on trying to find a mate in over 20 years, now that is tenacity.